Treasuries dropped from almost a five-week high before Federal Reserve Chair Janet Yellen testifies to lawmakers in Washington tomorrow as investors seek clarity on the central-bank’s plans to scale back monetary stimulus and raise interest rates next year.

Treasuries rose for a third day, pushing 10-year note yields close to the lowest level in almost two weeks on concern Cypriot lawmakers may reject a levy on bank deposits required to secure aid, boosting refuge appeal.